Honorary Trustees of the Institute are individuals whose achievements embody the purposes of the Institute. They have been appointed by the Board.
Explorer-in-residence at the National Geographic Society, Washington, D.C.
Director of the Surgical Intensive Care Unit at the Onassis Cardiac Surgery Center in Athens, Greece, until his retirement (2010).
Founding director of the Office of Scholarly Programs and the Kluge Center at the Library of Congress, Washington, D.C.
William E. Stirton Professor Emeritus of Anthropology at The University of Michigan-Dearborn, MI.
Emeritus Curator and Research Botanist, Smithsonian Institution, Washington, D.C.
Adjunt Professor, University of Maryland, College Park, MD.
President Emeritus Missouri Botanical Gardens, and George Engelmann Professor Emeritus of Botany, Washington University, St. Louis, MO.
President and CEO of the Wildlife Conservation Society, New York, NY.
Distinguished Professor and Hakai Chair in Ethnoecology, School of Environmental Studies, University of Victoria, Victoria, B.C., Canada.